At Masyaf, this ruler surrounded his tent with chalk to reveal the footsteps of the Assassins. He was a Kurd from Tikrit, and a rival of the Fatimid ruler Nur-ad-Din. Although he failed in his siege of Kerak, his forces were 
At Masyaf, this ruler surrounded his tent with chalk to reveal the footsteps of the Assassins. He was a Kurd from Tikrit, and a rival of the Fatimid ruler Nur-ad-Din. Although he failed in his siege of Kerak, his forces were able to retreat due to the hesitation of enemy reinforcements. He personally executed Raynald de Chatillon but spared Guy de Lusignan. After his conquest of a certain city, he accepted ransoms for all of its Frankish inhabitants and allowed Christian pilgrimage. For 10 points, name this founder of the Ayyubid dynasty and chivalrous conqueror of Jerusalem.
At Masyaf, this ruler surrounded his tent with chalk to reveal the footsteps of the Assassins.
{Saladin} or {Salahuddin} or {Salah}-{ad}-{Din} Yusuf ibn Ayyub